Hi Eric,
On Wed, Mar 12, 2014 at 2:40 PM, Eric Bénard <eric@eukrea.com> wrote:
> Hi Fabio,>> Le Wed, 12 Mar 2014 14:27:25 -0300,> Fabio Estevam <festevam@gmail.com> a écrit :>> Any ideas?>>> do you drive the signal LCD_EN GPIO3_17 ?
Good point. Even though I am not touching LCD_EN it is at the correct
level of 0.
I get 3.3V at LCD_VCC and VDD_LCDIO. 5V is present at LCD_5V that
drives the backlight.
So the LCD supplies seem to be good.
The problem should be in some other area.
Thanks,
Fabio Estevam

Denis/Eric,
On Wed, Mar 12, 2014 at 3:24 PM, Fabio Estevam <festevam@gmail.com> wrote:
> Hi Eric,>> On Wed, Mar 12, 2014 at 2:40 PM, Eric Bénard <eric@eukrea.com> wrote:>> Hi Fabio,>>>> Le Wed, 12 Mar 2014 14:27:25 -0300,>> Fabio Estevam <festevam@gmail.com> a écrit :>>> Any ideas?>>>>> do you drive the signal LCD_EN GPIO3_17 ?>> Good point. Even though I am not touching LCD_EN it is at the correct> level of 0.>> I get 3.3V at LCD_VCC and VDD_LCDIO. 5V is present at LCD_5V that> drives the backlight.>> So the LCD supplies seem to be good.>> The problem should be in some other area.
Do you know of a kernel version where imxfb is functional?
I have tried latest linus tree and booted a non-dt kernel on mx25pdk
and I get the same white display.
Regards,
Fabio Estevam

Hi Fabio,
Le Wed, 12 Mar 2014 15:24:57 -0300,
Fabio Estevam <festevam@gmail.com> a écrit :
> The problem should be in some other area.>
if you have an oscilloscope, can you probe PIXCLK, HSYNC, VSYNC and DE
to check the signals are properly configured vs the datasheet of your
display.
Eric

Hi Eric,
On Wed, Mar 12, 2014 at 6:07 PM, Eric Bénard <eric@eukrea.com> wrote:
> if you have an oscilloscope, can you probe PIXCLK, HSYNC, VSYNC and DE> to check the signals are properly configured vs the datasheet of your> display.
Yes, I have measured VSYNC and there is no activity on this line.
Also tried 3.13 with a non-dt kernel and the same issue is seen.
Running FSL 2.6.31 I can see VSYNC at 57Hz and Tux on the display, so
the hardware is good.
At least for me imxfb seems to be broken even for the non-dt case.
Regards,
Fabio Estevam

Среда, 12 марта 2014, 18:16 -03:00 от Fabio Estevam <festevam@gmail.com>:
> Hi Eric,> > On Wed, Mar 12, 2014 at 6:07 PM, Eric Bénard <eric@eukrea.com> wrote:> > > if you have an oscilloscope, can you probe PIXCLK, HSYNC, VSYNC and DE> > to check the signals are properly configured vs the datasheet of your> > display.> > Yes, I have measured VSYNC and there is no activity on this line.> > Also tried 3.13 with a non-dt kernel and the same issue is seen.> > Running FSL 2.6.31 I can see VSYNC at 57Hz and Tux on the display, so> the hardware is good.> > At least for me imxfb seems to be broken even for the non-dt case.
I will check the latest changes on the weekends for i.MX27.
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On 03/12/2014 06:27 PM, Fabio Estevam wrote:
> Hi Denis,
Hi,
> I turned on the backlight supply via bootloader (kernel still does not> support MC34704 PMIC yet),
Maybe this patchset[1] could help, but it still requires some work, and
I don't have the hardware to test anymore right now.
So feel free to improve it and resubmit it.
References:
-----------
[1]http://lists.infradead.org/pipermail/linux-arm-kernel/2013-November/thread.html#214619
Denis.

+CC: Tomi Valkeinen
Четверг, 13 марта 2014, 8:25 +04:00 от Alexander Shiyan <shc_work@mail.ru>:
> Среда, 12 марта 2014, 18:16 -03:00 от Fabio Estevam <festevam@gmail.com>:> > Hi Eric,> > > > On Wed, Mar 12, 2014 at 6:07 PM, Eric Bénard <eric@eukrea.com> wrote:> > > > > if you have an oscilloscope, can you probe PIXCLK, HSYNC, VSYNC and DE> > > to check the signals are properly configured vs the datasheet of your> > > display.> > > > Yes, I have measured VSYNC and there is no activity on this line.> > > > Also tried 3.13 with a non-dt kernel and the same issue is seen.> > > > Running FSL 2.6.31 I can see VSYNC at 57Hz and Tux on the display, so> > the hardware is good.> > > > At least for me imxfb seems to be broken even for the non-dt case.> > I will check the latest changes on the weekends for i.MX27.
I acknowledge that the (linux-next-20140314) framebuffer driver works fine.
Today I checked it on Phytec-PCM970 board with i.MX27 (DT).
Nevertheless, I ask Tomi to apply at least two patches for this driver:
http://www.spinics.net/lists/arm-kernel/msg315522.html
http://www.spinics.net/lists/arm-kernel/msg315523.html
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On Sat, Mar 15, 2014 at 2:14 AM, Alexander Shiyan <shc_work@mail.ru> wrote:
> I acknowledge that the (linux-next-20140314) framebuffer driver works fine.> Today I checked it on Phytec-PCM970 board with i.MX27 (DT).
Thanks for confirming imxfb is functional, Alexander.
Just tried linux-next-20140314 and still do not get LCD functional, so
it looks like a mx25pdk specific issue then.
Regards,
Fabio Estevam

Суббота, 15 марта 2014, 11:17 -03:00 от Fabio Estevam <festevam@gmail.com>:
> On Sat, Mar 15, 2014 at 2:14 AM, Alexander Shiyan <shc_work@mail.ru> wrote:> > > I acknowledge that the (linux-next-20140314) framebuffer driver works fine.> > Today I checked it on Phytec-PCM970 board with i.MX27 (DT).> > Thanks for confirming imxfb is functional, Alexander.> > Just tried linux-next-20140314 and still do not get LCD functional, so> it looks like a mx25pdk specific issue then.
Fabio, I use settings, which sent in the patch. Look, maybe it will help ...
http://www.spinics.net/lists/arm-kernel/msg315707.html
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